CHEVROLET CAPRICE FUSE PROBLEM

1991 Chevrolet Caprice • 180,000 miles

My 1991 chevy caprice cuts off right when I start it. The fuse that controls the ecm, egr solenoid, air control pops right when I start it and the car cuts off. I have replaced the egr solenoid, fuel filter, fuel pump and fuel injectors. What could cause this?